Estimation scheme for parameters of wireless channel model in OFDM communication systems

WANG Yong; GE Jian-hua; WU Xiao-li

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Estimation scheme for parameters of wireless channel model in OFDM communication systems

更新时间：2024-10-14

- Estimation scheme for parameters of wireless channel model in OFDM communication systems
- Issue 8, Pages: 11-15(2007)
- 作者机构：
  
  1. 西安电子科技大学综合业务网理论及关键技术国家重点实验室
  2. 西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西,西安,710071
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN919.72
- Published：2007
- 稿件说明：
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WANG Yong, GE Jian-hua, WU Xiao-li. Estimation scheme for parameters of wireless channel model in OFDM communication systems[J]. 2007, (8): 11-15.
DOI：

WANG Yong, GE Jian-hua, WU Xiao-li. Estimation scheme for parameters of wireless channel model in OFDM communication systems[J]. 2007, (8): 11-15. DOI：

摘要

利用导频子载波时频相位相关性统计检测与QAM信号解映射判决误差统计

提出了一种适用于频域导频无线OFDM系统的传输信道模型化参数检测方案

包括信道最大多径时延、最大多普勒频率和信噪比检测;能够有效解决传统的OFDM信道估计算法通常按照最恶劣信道情况上限进行设计

以及基于MMSE准则最优信道估计器中信道先验信息统计运算复杂度高的缺陷;仿真结果表明

在低复杂度条件下可以有效获知当前传输信道模型参数的近似统计信息。

Abstract

The conventional channel estimator in OFDM system was designed to cope with the worst-case channel condi-tion

thus performance degradation can be induced due to the imperfect channel estimation.Though wiener filter based on the minimum mean-squared error（MMSE） is the optimal linear estimator

it requires the prior information of transmis-sion channel.In order to select the near optimal prestored channel interpolation filter coefficients

three channel parame-ters detecting methods including maximum multipath delay

Doppler frequency and SNR based on the time and fre-quency correlation functions of the channel

the Euclidean distance of hard-decision in pilots position respectively

were proposed.The method proposed with low complexity allows an efficient implementation for adaptive channel estimation algorithm as well as multi-user OFDM systems.

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Related Institution

Key Laboratory of Specialty Fiber Optics and Optical Access Networks,School of Communication and Information Engineering,Shanghai University

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中国科学院上海微系统与信息技术研究所无线传感网与通信重点实验室

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